Pipe-joint for air-brake connections.



PATENTED NOV. 22, 1904.

S. FEUST.

PIPE JOINT FOR AIR BRAKE CONNECTIONS.

APPLICATION FILED DEG. 9, 1903.

N0 MODEL.

ATTORNEY UNITED STATES Patented November 22, 1904.

PATENT. QEETCE.

PIPE-JOINT FOR AIR-BRAKE CONNECTIONS.

SPECIFICATION forming part of Letters Patent No. 775,769, dated November22, 1904-..

Application filed December 9, 1903. Serial No. 184,509. (No model.)

` T @ZZ whom, it Netty concern:

Be it known that I, SIGMUND Fnus'r, a citi- Zen of the United States,and a resident of the borough of the Bronx, in the city of New York,county of New York, and State of New York, have invented new and usefulImprovements in Pipe-Joints for Air-Brake Connections, of which thefollowing is a full, clear, and exact description.

My invention relates to railway-'air-brake connections composed offlexiblehose of spirally-wound metal strips lined with rubber tubing andfurnished at each end with a metal coupling; and my invention relatesmore particularly to the means of joining such hose with such couplings.

The object of my invention is to devise an air-tight joint which can beeffected without soldering or brazing the metal tubing' and couplings.In the Letters Patent of the United States numbered 7 35,7 35 and datedAugust l1, 1903, issued to Berton L. Wright and myself, such a joint isdescribed; but in that case the ribs of the metal tubingare used asscrewthreads and the end of the hose is screwed into the nipple of thecoupling.

In the invention hereinafter described and claimed the end section ofthe rubber-lined metal tubing is covered with a metal bushing or metalbushings and then thrust into the bore of the nipple of the coupling andsecured therein by suitable mechanical means.

Referring to the drawings, Figure l is a central longitudinal section ofmy improved joint. Fig. 2 is across-section of the sameon the line 2 2of Fig. 1.

In both figures of the drawings similar letters indicate similar parts.f

A is the metal coupling, I) its lengthened nip-Y ple, and a an annularseat therein.

B is the flexible metal tubing.

C is the rubber lining-tube with a flange.

D is a metal bushing upon the metal tubing. E is a second bushingcovering the first.`

F is a lianged screw-threaded binding ring or nut; G, a set-screw; H, ametal ferrule, and S a pin or guiding or locking key.

My invention is intended for uniting to couplings flexiblespirally-wound metal tubing of the kind described in the Letters Patentof the United States No. 330,910, dated November 24, 1885, and whichwere granted to E. Levavasseur.

The pipe-coupling A is of ordinary construction, except the nipple Z) ismade longer and its bore of greater diameter than ordinarily. Thedifference in the diameters of the bore of the nipple Z) and the boreofthe nipple g provides within the coupling an annular seat a for the endof the hose to bear upon. The nipple o is provided with malescrew-threads with which the female screwthreads of the flanged bindingnut or ring F will engage.

To make onel of my improved joints, I make upon the exterior end portionof the metal tubing which is to enter into formation of the joint thesleeve or bushing D, which is preferably of Babbitt metal molded or cutin such a way that the spiral interstices between the folds of the metaltubing, which are covered by the bushing, are filled with spiralscrewthreads integrally molded or out upon the inside of the bushing.Upon this bushing D I place a second bushing, of hard metal, E. Upon theend of the flexible tubing B, I then seat a metal ferrule H and placethe softrubber tubing within thel metal tubing, so that rthe iiange ofthe rubber tubing rests upon and covers the liange of the ferrule. Theextremity of the metal tubing protected by the bushing, the ferrule, andthe flange of the rubber tubing I then press or thrust into the bore ofthe nipple carefully guarding against any twisting or torsional strainupon the hose, its lining, ferrule, and bushing until the end of thehose reaches the annular seat a. The pin or locking-key S is theninserted betweenthe nipple and the bushing in a slot made to receive it.The binding-nut F, which I place upon the metal tubing before molding orlocating any bushing thereon, is next screwed upon the nipple until thehose is securely fastened .to the coupling, and the end thereof isthereby compressed against the annular seat a. Finally, the nut F issecured to the nipple L of the coupling and prevented from unscrewing bythe binding-screw Gr, inserted in the nut F and operating against thenipple Z2. It will be observed that the joint is made without rotating'or twisting the metal tubing, and this method or' making the jointavoids spreading the ribs of the metal tubing and keeps them asair-tight as they were before the tubing' was united with the coupling.Furthermore, it does not turn or rumple the rubber lining, which is avery important feature.

The lange of the rubber tubing and the .ferrule H, employed for makingan air-tight joint, are referred to in the aforesaid Letters Patentissued to Berton L. fright and myself. In place of the rubber tubingused for lining and packing any other tubing of suitable material may beused for such purposes.

The second or outer bushing, E, may be omitted. The ferrule H may alsobe omitted; but in that case the edges of the end of the metal tubingand bushing should be broken or rounded, so as to prevent them cuttinginto the flange of the rubber tubing. The fastening and compressing'mechanism described and shown I do not insist upon. The particular formof such mechanism shown does not constitute the substance of myinvention, and the mechanism which may be used in place thereof forfastening and compressing is susceptible of wide variations. In place ofthe flanged nut screwed upon the nipple L a flanged inside thimble maybe screwed into such nipple b. For the set-screw G, if the outsidebinding-nut F be used, there may be substituted a binding nut encirclingthe nipple Z) and screwed toward the end of the nut F, or the set-screwGr may be omitted and the nut F may be secured to the nipple I) by leadand oil or by similar means, and such variations will not materiallychange my invention.

It will be readily understood that the coupling A may be a pipe-couplingof the kind shown in the drawings or a coupling-head used on air-brakeconnections of familiar construction.-

Having now described my invention, what I claim as new is l. In apipe-joint for spirally-wound metal tubing, the combination of acoupling A of ordinary construction, but having one of its nippleslengthened and furnished interiorly with an annular seat a, with abushing constructed interiorly with spiral threads which engage with theoutside interstices of the metal tubing, the metal tubing B, the angedrubber tubing C, the key S and a means for compressing the end of themetal tubing protected by the rubber langeagainst the seat a andfastening in the coupling the tubing without rotating the bushing,tubing or lining'.

S2. In a pipe-joint for spirally-wound metal tubing, the combination ofa coupling A of ordinary construction, but having one of its nippleslengthened, eXteriorly screw-threaded and furnished interiorly with anannular seat at, with a bushing D constructed interiorly with spiralthreads which engage with the outside interstices of the metal tubing,the metal tubing B, the lianged rubber tubing C, the key S, the flangednutFwhich is screwed upon the nipple L and bound thereto by theset-screw G, whereby the end of the metal tubing protected by the langeof the tubing C is compressed against the seat a and the tubing, itsbushing and lining are secured in the coupling without rotation.

3. In a pipe-joint for spirally-wound metal tubing, the combination of acoupling A of ordinary construction, but having one of its nippleslengthened, exteriorly screw-tln'eaded and furnished interiorly with anannular seat a, with a bushing D constructed interiorly with spiralthreads which engage with the outside interstices of the metal tubing,the metal tubing B, the flanged rubber tubing' C, the flanged nut Fwhich is screwed upon the nipple Z; and bound thereto by the set-screwG, whereby the end of the metal tubing protected by the iiange 'of thetubing C is compressed against the seat c and the tubing, its bushingand lining are secured in the coupling without rotation.

Il. In a pipe-joint for spirally-wound metal tubing', the combination ofa coupling A of ordinary construction, but having one of its nippleslengthened, exteriorly screw-threaded and furnished interiorly with anannular seat a, with a bushing D constructed interiorly with spiralthreads which engage with the outside interstices of the metal tubing,the bushing E covering the bushing D, the metal tubing B, the flangedrubber tubing C, the key S, the flanged nut F which is screwed upon thenipple I) and bound thereto by the set-screw G, whereby the end of themetal tubing protected by the flange or' the tubing' C is compressedagainst the seat c and the tubing, its bushing and lining are secured inthe coupling without rotation.

5. In a pipe-jointfor spirally-wound metal tubing, the combination of acoupling A of ordinary construction, but having one of its nippleslengthened, exteriorly screw-threaded and furnished interiorly with anannular seat et, with a bushing D constructed interiorly with spiralthreads which engage with the outside interstices of the metal tubing,the bushing E covering the bushing D, the metal tubing B, the iiangedrubber tubing C, the lianged nut F which is screwed upon the nip- IOOIIO

ple and bound thereto by the' set-screw G, whereby the end of the metalltubing protected by the flange of the tubing C is compressed against theseat L and the tubing, its bushing and lining are secured in thecoupling Without rotation.

6. In a pipe-joint for spirelly-Wound metal tubing', the Combination ofthe key S, the eoupling A and the buShingE, the key S being inl sertedbetween the nipple Z) of the eouplingA IO i and the bushingEin a slotmade to receive it.

` SIGMUND FEUST.

Witnesses ALBERT MILLER, MICHAEL MARKOWITZ.

